Will Drano Kill Drain Flies? (Why It May Not Be Effective)

There is nothing more annoying than noticing drain flies on the walls of your house. While they’re generally harmless, they’re definitely unsightly. So you may be asking yourself, “Will Drano kill drain flies?” Well, wonder no more. In this article, not only will you find out whether Drano will kill drain flies or not, but you’ll also learn steps you’ll need to take to ensure a drain fly infestation doesn’t happen again!

Will Drano Kill Drain Flies?

Drano is extremely effective at killing drain flies. The best Drano to use is the kind that expands in pipes as well. If you’re not sure what type this is, then I’d recommend Drano Dual-Force Foamer Clog Remover.

But remember, even if you use Drano to remove drain flies, but you don’t remove the causes, then the chances are they’re going to come back again!

Why Is Drano So Good At Killing Drain Flies?

Drano is great for killing drain flies because one of the main ingredients used is lye. You probably know already how powerful lye is. In fact, it’s not uncommon for it to dissolve fat, oil, hair, and many different kinds of buildups in your pipes.

How To Use Drano To Kill Drain Flies?

Before anything, you’ll need to make sure you’re wearing safety equipment whilst using Drano. Goggles and gloves are key because you definitely don’t want to end up getting them on your skin or eyes. Once you’re ready, you’ll just need to pour around 16oz of the stuff down the pipe and then leave it for 15 minutes.

In cases where there are lots of drain flies, or you suspect lots of gunk in the pipe that the drain flies are breeding in, then you should wait 30 minutes.

Once the time is up, you should then flush the drain with hot water to allow all the Drano to pass through.

Also, you can use Drano regularly to help keep the pipes clean and reduce the chance of drain flies coming back in the future.

Drain fly in a macro shot

Other Steps To Take

However, if you just use Drano to remove drain flies, and don’t take other steps, then the chances are that the drain flies will just return once the Drano has worn off. So as well as using Drano, you should also:

  1. Make sure any clogs or blockages in your drain have been removed as well. A great chemical for this is Drano Max Gel Clog Remover.
  2. As well as this, you’ll also need to kill any drain flies you see in your house as well. It only takes one pregnant drain fly to lay loads of eggs, and then you’re back to square one. (Fly sprays are the go-to choice for this.)
  3. It’s also not a good idea to mix Drano with other chemicals either. Doing so can cause toxic gases to be released, as well as potentially reduce the effectiveness of both.
  4. Look for other areas where there may be a drain fly infestation. Normally, they can be located in areas with standing water. In fact, sometimes, the main infestation could even be coming from outside your home.
  5. You can also mix apple cider vinegar with hand soap to trap any adults and kill them as well.
  6. Give the drain pipe a thorough clean with a drain cleaner or brush to make sure you’re removing any places the drain flies can breed again.
  7. And lastly, in severe cases, sometimes the best thing to do is hire a professional to get rid of them for you!

Is Drano The Most Effective Choice?

Drano is definitely an effective choice, but you may be wondering if it’s THE most effective choice. Well, if anything, Drano could be a little bit overkill. Not only will Drano kill drain flies in your pipes, but it could also end up damaging them if you leave it to sit for too long. That’s not to mention how bad Drano is for the environment, either.

So if you’re not too sure about using Drano to remove the drain flies in your home. You can also use bleach and boiling water as an alternative; however, it may not be as effective when there are bigger infestations. And if that doesn’t work, THEN move on to something more extreme.


As you can see, Drano can be an effective method to remove drain flies from your pipes. However, if you’re not also using the proper methods to remove any lingering drain flies and their habitat. Then you’ll soon notice more of the pests in your house again.

If you liked this article, make sure you check out the rest of the website. Otherwise, have a great day!

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